//
//  WelcomeViewController.swift
//  weibo-01
//
//  Created by 韩家奇 on 15/11/8.
//  Copyright © 2015年 hanjiaqi. All rights reserved.
//

import UIKit
import SDWebImage
class WelcomeViewController: UIViewController {
    
    override func loadView() {
        //直接使用背景图像作为跟视图,不用关心图像的缩放问题
        view = backImageView
        setupUI()
    }

    //视图加载完成之后的后续处理,通常用来设置数据
    override func viewDidLoad() {
        super.viewDidLoad()
        //异步加载头像
        iconView.sd_setImageWithURL(UserAccountViewModel.sharedUserAccount.avataURL, placeholderImage: UIImage(named: "avatar_default_big"))
        
    }
    //视图已经显示
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        //1.更改约束 改变位置
        iconView.snp_updateConstraints { (make) -> Void in
            make.bottom.equalTo(view.snp_bottom).offset(-view.bounds.height + 200)
        }
        //2.动画效果
        welcomeLabel.alpha = 0
        UIView.animateWithDuration(1.5, delay: 0, usingSpringWithDamping: 0.8, initialSpringVelocity: 10, options: [], animations: { () -> Void in
            //修改所有可动画属性 - 自动布局的动画
            self.view.layoutIfNeeded()
            }) { (_) -> Void in
                UIView.animateWithDuration(0.8, animations: { () -> Void in
                    self.welcomeLabel.alpha = 1
                    }, completion: { (_) -> Void in
                        print("ok")
                        //发送通知
                        NSNotificationCenter.defaultCenter().postNotificationName(HQSwitchRootViewControllerNotification, object: nil)
                })
        }
    }
    // MARK: - 懒加载控件
    //背景图片
    private lazy var backImageView: UIImageView = UIImageView(imageName: "ad_background")
    //头像
    private lazy var iconView: UIImageView = {
        let iv = UIImageView(imageName: "avatar_default_big")
        //设置圆角
        iv.layer.cornerRadius = 45
        iv.layer.masksToBounds = true
        return iv
    }()
    //欢迎标签
    private lazy var welcomeLabel: UILabel = UILabel(title: "欢迎回来", fontSize: 18)
    
}
//MARK: - 设置界面
extension WelcomeViewController {
    private func setupUI() {
        //1.添加控件
        view.addSubview(iconView)
        view.addSubview(welcomeLabel)
        //2.自动布局
        iconView.snp_makeConstraints { (make) -> Void in
            make.centerX.equalTo(view.snp_centerX)
//            make.bottom.equalTo(view.snp_bottom).multipliedBy(0.7)
            make.bottom.equalTo(view.snp_bottom).offset(-200)
            make.width.equalTo(90)
            make.height.equalTo(90)
        }
        welcomeLabel.snp_makeConstraints { (make) -> Void in
            make.centerX.equalTo(iconView.snp_centerX)
            make.top.equalTo(iconView.snp_bottom).offset(16)
        }
    }
}

